CVE-2026-69588

high

Missing release of memory after effective lifetime in Windows TCP/IP allows an unauthorized attacker to deny service over a network.

Vendor / product: Microsoft — windows 11 23h2

Missing release of memory after effective lifetime in Windows TCP/IP allows an unauthorized attacker to deny service over a network.

CVSS

7.5

7.5 (CVSS v3.1)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity source: NVD CVSS v3.1 (secure@microsoft.com)

Timeline (UTC)

Published: 2026-09-08 18:19

Modified: 2026-09-18 14:35

NVD status: Analyzed

Last synced 1 day ago

Verified against the source API 2026-10-27 06:51 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

microsoft / windows_11_23h2 <10.0.22631.7582

microsoft / windows_11_24h2 <10.0.26100.9445

microsoft / windows_11_25h2 <10.0.26200.9445

microsoft / windows_11_26h1 <10.0.28000.2954

microsoft / windows_server_2022 <10.0.20348.5622

microsoft / windows_server_2025 <10.0.26100.33438

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

NVD CVE API 2.0 — fetched 2026-10-27 06:51 UTC · record ↗